Texas Instruments TPS7A0508PDQNT

Overview

TPS7A0508PDQNT from Texas Instruments is an ultralow-quiescent-current (1 µA typ) 200-mA low-dropout regulator in a 1.0-mm × 1.0-mm X2SON-4 package, delivering fixed 0.8 V output with ±1% typical accuracy and 235 mV max dropout at 200 mA. It supports input voltages from 1.4 V to 5.5 V and features active output discharge, foldback current limiting, and stability with ≥0.47-µF ceramic output capacitance - ideal for battery-powered wearable electronics and always-on subsystems.

For engineers reviewing the TPS7A0508PDQNT datasheet, TPS7A0508PDQNT pinout, TPS7A0508PDQNT application, or TPS7A0508PDQNT equivalent, key selection criteria include quiescent current under light load, dropout voltage at full rated current, thermal performance in ultra-small packages, enable pin logic thresholds, and compatibility with low-ESR ceramic capacitors in space-constrained designs.

Technical Context

The TPS7A0508PDQNT employs a PMOS pass transistor architecture enabling ultralow IQ and near-zero reverse current during shutdown. Its internal reference and error amplifier maintain tight output regulation across –40°C to +125°C junction temperature, with line regulation of ≤16.5 mV and load regulation of ≤43 mV (DBV/DQN/YKA) over 100 µA–200 mA.

It integrates UVLO (1.21–1.37 V threshold with 40-mV hysteresis), thermal shutdown (160°C trip), and an active pulldown circuit (120-Ω typical) on the OUT pin. The EN pin accepts logic-high enable at ≥0.9 V and asserts shutdown below 0.4 V, with leakage <10 nA at 5.5 V.

Key Specifications

Pinout & Package

The TPS7A0508PDQNT is housed in a 1.0-mm × 1.0-mm, 0.4-mm height, 4-pin X2SON (DQN) package with wettable flanks, optimized for automated optical inspection and high-density layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-quiescent-current LDO applications.

Compared with XC6210B082MR-G and RP111N008B-TR-F, the TPS7A0508PDQNT uniquely combines 1.0-mm² X2SON packaging, integrated active discharge, and industry-leading 1-µA IQ with full enable control - making it optimal for space- and energy-constrained designs requiring fast, reliable power sequencing.

Availability

TPS7A0508PDQNT is available at Aetrix Electronics and suitable for wearable electronics, always-on sensor nodes, and wireless remote controls requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS7A0508PDQNT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.

The TPS7A05 family targets ultra-low-power battery-operated systems, emphasizing nanoscale packaging, sub-µA quiescent current, and robust operation across extended temperature ranges - specifically engineered for multi-year IoT endpoints and energy-harvesting applications.

FAQ

What is the maximum dropout voltage of the TPS7A0508PDQNT at 200 mA output current?

The TPS7A0508PDQNT has a maximum dropout voltage of 235 mV at 200 mA output current and TJ = –40°C to +85°C, measured at VOUT = 3.3 V nominal. For its 0.8-V output version, the max dropout is 915 mV under identical conditions - ensuring regulation down to VIN = 1.715 V at full load.

Does the TPS7A0508PDQNT require an external pull-up resistor on the EN pin?

No, the TPS7A0508PDQNT does not require an external pull-up on EN. When enable functionality is unused, the EN pin must be connected directly to IN. Its logic-high threshold is ≥0.9 V, and leakage current is <10 nA at 5.5 V, eliminating need for external biasing components.

Can the TPS7A0508PDQNT operate from a single Li-MnO₂ battery?

Yes, the TPS7A0508PDQNT operates from a single Li-MnO₂ battery (nominal 3.0 V, end-of-life ~2.0 V) across its full 1.4–5.5 V input range. With 235 mV dropout at 200 mA, it maintains 0.8 V output until VIN drops to 1.035 V - well below the battery's usable voltage window.

What is the minimum output capacitor required for stability with the TPS7A0508PDQNT?

The TPS7A0508PDQNT is stable with a minimum 0.47-µF ceramic capacitor (X5R/X7R) on the OUT pin. TI validates performance with 0.47–22 µF; values below 0.47 µF risk instability and excessive output ripple under dynamic load conditions.

Is the thermal pad on the TPS7A0508PDQNT electrically connected to GND?

Yes, the exposed thermal pad on the bottom of the TPS7A0508PDQNT X2SON package is internally connected to GND. It must be soldered to a large-area PCB ground plane to achieve specified RθJB = 83.5°C/W and ensure safe operation at 200 mA continuous load.